Question 1
Question
What modifier is to be used if you wish to declare that you want to no longer allow subclasses to override your variables or methods?
Answer
-
Finally
-
Abstract
-
Final
-
Synchronized
-
Volatile
Question 2
Answer
-
Advanced windowing tool kit
-
Abstract Windowing Term Kit
-
Abstract Windowing Tool Kit
-
Applet Window Tool Kit
-
Asynchronous windowing tool kit
Question 3
Question
Which operator is used for concatenation in java?
Question 4
Question
What is the type and value of the following expression?
-4 + 1/2 + 2*-3 + 5.0
Answer
-
int -5
-
double -4.5
-
int -4
-
double -5.0
Question 5
Question
In object-oriented programming, the process by which one object acquires the properties of another object is called
Answer
-
Encapsulation
-
Polymorphism
-
Overloading
-
Inheritance
-
Overriding
Question 6
Question
Java compiler javac translates Java source code into ………………………
Answer
-
Assembler language
-
Byte code
-
Bit code
-
Machine code
-
Platform dependent code
Question 7
Question
Which of the following statements about Java Threads is correct?
Answer
-
Java threads don’t allow parts of a program to be executed in parallel
-
Java is a single-threaded language
-
Java’s garbage collector runs as a high priority thread
-
Ready, running and sleeping are three states that a thread can be in during its life cycle
-
Every java application is not multithreaded
Question 8
Question
The wrapping up of data and functions into a single unit is called
Answer
-
Encapsulation
-
Abstraction
-
Data Hiding
-
Polymorphism
-
Message passing
Question 9
Question
In Java, declaring a class abstract is useful
Answer
-
To prevent developers from further extending the class
-
When it doesn't make sense to have objects of that class
-
When default implementations of some methods are not desirable
-
To force developers to extend the class not to use its capabilities
-
When it makes sense to have objects of that class
Question 10
Question
Which of the following is a member of the java.lang package?
Answer
-
List
-
Queue
-
Math
-
Stack
-
Process
Question 11
Answer
-
Universal reader locator
-
Universal reform loader
-
Uniform resource loader
-
Uniform resource locator
-
Uniform reader locator
Question 12
Question
What is the sequence of major events in the life of an applet?
Answer
-
init, start, stop, destroy
-
start, init , stop , destroy
-
init, start , destroy, stop
-
init, start, destroy
-
destroy, start, init, stop
Question 13
Question
What will be the result of the expression 13 & 25?
Question 14
Question
What information may be obtained from a ResultSetMetaData object?
Answer
-
Database URL and product name
-
JDBC driver name and version
-
Number of columns in the result set
-
Number of rows in the result set
-
Number of tables in the database
Question 15
Question
Which is a special file that contains information about the files packaged in a JAR file?
Answer
-
Class file
-
Source file
-
Text file
-
Manifest file
-
Image file
Question 16
Question
Evaluate the Java expressions:
int i=3, j=7, k=11;
j + k % i
Question 17
Question
Which of the following provides the naming services for the server to register the object and for the client to locate the object?
Answer
-
Server object interface
-
Server implementation
-
RMI Registry
-
Server stub
-
Server Skeleton
Question 18
Question
Which is not a valid operator in Java?
Question 19
Question
Which of the following is not an Applet method?
Answer
-
start()
-
init()
-
run()
-
stop()
-
destroy()
Question 20
Question
If ClassA extends ClassB, then
Question 21
Answer
-
Secure Server Layer
-
Secure Socket Layer
-
Server Socket Layer
-
Session Service Layer
Question 22
Question
Consider the following HTML page code:
< html > < body >
< a href='/servlet/HelloServlet' >POST< /a >
< /body >< /html >
Which method of HelloServIet will be invoked when the hyperlink is clicked?
Answer
-
doGet
-
doPost
-
doHref
-
servicePost
Question 23
Question
Stub is a ____________ proxy for the remote object.
Answer
-
Server side
-
Client side
-
Both side
-
none of the above
Question 24
Question
What is the Output:
String s1 = new String("Test");
String s2 = new String("Test");
if (s1==s2)
System.out.println("Same");
if (s1.equals(s2))
System.out.println("Equals");
Question 25
Question
Which declaration of the main method below would allow a class to be started as a standalone program.
Answer
-
public static int main(char args[])
-
public static void main(String args[])
-
public static void main(string args[])
-
public static void main(String args)
Question 26
Question
Which of these are legal identifiers.
Answer
-
number_1
-
number_a
-
$1234
-
All of the above
Question 27
Question
Which of the following are keywords in Java.
Answer
-
implement
-
friend
-
NULL
-
synchronized
Question 28
Question
Given a one dimensional array arr, what is the correct way of getting the number of elements in arr.
Answer
-
arr.length
-
arr.length - 1
-
arr.size
-
arr.length()
Question 29
Question
A class can have many methods with the same name as long as the number of parameters or type of parameters is different. This OOP concept is known as
Answer
-
Method Invocating
-
Method Overriding
-
Method Labeling
-
Method Overloading
Question 30
Question
Is this True or False. In Java an abstract class cannot be sub-classed.
Question 31
Question
What is returned when the method substring(2, 4) is invoked on the string "example"? Include the answer in quotes as the result is of type String.
Question 32
Question
What is the result of evaluating the expression 14 ^ 23. Select the one correct answer.
Question 33
Question
Which of the following is not a return type?
Answer
-
boolean
-
void
-
public
-
Button
Question 34
Question
Which operator is used to perform bitwise exclusive or.
Question 35
Question
If result = 2 + 3 * 5, what is the value and type of result variable?
Answer
-
17, byte
-
25, byte
-
17, int
-
25, int
Question 36
Question
All the wrapper classes (Integer, Boolean, Float, Short, Long, Double and Character) in java
Answer
-
are final
-
are private
-
are serializable
-
are immutatable
Question 37
Question
What is the result of compiling and running this program? Select the one correct answer.
public class test
{ public static void main(String args[])
{ int i, j;
int k = 0;
j = 2;
k = j = i = 1;
System.out.println(k);
}
}
Answer
-
The program does not compile as k is being read without being initialized.
-
The program does not compile because of the statement k = j = i = 1;
-
The program compiles and runs printing 1.
-
The program compiles and runs printing 2.
Question 38
Question
A program needs to store the name, salary, and age of employees in years. Which of the following data types should be used to create the Employee class. Select the three correct answers.
a. char
b. boolean
c. Boolean
d. String
e. int
f. double
Question 39
Question
When we go for thread synchronization?
Answer
-
to remove the lock on the thread
-
when there is a single thread
-
to make a thread in sleep mode
-
when we want to prevent any other multiple thread to act an same object
Question 40
Question
Which statement is true?
public void test(int x)
{ int odd = 1;
if(odd)
{ System.out.println("odd"); }
else
{ System.out.println("even"); }
}
Answer
-
"odd" will always be output.
-
"even" will always be output.
-
Compilation fails.
-
"odd" will be output for odd values of x, and "even" for even values.
Question 41
Question
Which code determines the int value data closer to, but not greater than, a double value b?
Answer
-
int data = (int) Math.floor(b);
-
int data = (int) Math.abs(b);
-
int data = (int) Math.ceil(b);
-
int data = (int) Math.min(b);
Question 42
Question
Which of the following statements is false as far as different type of statements is concern in JDBC?
Answer
-
Regular Statement
-
Interim Statement
-
Callable Statement
-
Prepared Statement
Question 43
Question
Which of the following describes the correct sequence of the steps involved in making a connection with a database.
1. Loading the driver
2. Process the results.
3. Making the connection with the database.
4. Executing the SQL statements.
Answer
-
1,2,3,4
-
1,3,4,2
-
2,1,3,4
-
4,1,2,3
Question 44
Question
Which one not a JDBC interface?
Answer
-
Connection
-
Statement
-
DriverManager
-
ResultSet
Question 45
Question
Which one is a correct MySql Driver class name?
Question 46
Question
Which one correct JDBC statements?
Answer
-
Statement
-
PreparedStatement
-
CallableStatement
-
all of above
Question 47
Question
Where the stored procedures reside?
Answer
-
In side server memory
-
In side cache
-
In side database
-
In side browser
Question 48
Question
By default cursor pointing to-
Answer
-
Column Header
-
First Record
-
Last Record
-
Middle Record
Question 49
Question
By default "auto commit" option is -
Question 50
Question
We can get the column names using?
Answer
-
ResultSetColumnData
-
ResultSetMetaData
-
ResultSetHeaderData
-
ResultSetTableData
Question 51
Question
SELECT, INSERT, DELETE, UPDATE, COMMIT and ROLLBACK comes under ?